# TODO 列表嵌套

list1 =[[1,2,1,3,1],[2,2,3,4,4],'1','b',['f','g',[1,'k',3]]
        ]




#  需求 找到f
# for item in list1:
#     print(item)
#     for item1 in item:
#         print(item)

# print(list1[4][0])
print(list1[4][2][1])


